{"product_id":"sierra-mp41020-4-position-marine-ignition-switch","title":"Sierra MP41020 4-Position Marine Ignition Switch","description":"\u003cp class=\"nvn-hero\"\u003eThe Sierra MP41020 is a universal four-position marine ignition switch built to drop in when your old one starts sticking. Brass body, keyed lock, and a simple four-wire dash-mount connection. Acc, Off, Run, Start, the way your hands already expect. It meets or exceeds the factory switch it replaces, so you're back cranking without a trip to the dealer.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eA boat's ignition switch takes more abuse than most people think. Salt air, spray off the deck, and a thumb reaching for the key a few thousand times a season. When the old one starts sticking or the key won't turn clean, the Sierra MP41020 is a straight replacement that gets you back on the water. It's a universal four-position marine ignition switch with a brass body, a keyed lock, and a simple four-wire connection that mounts right through the dash.\u003c\/p\u003e\n\u003cp\u003eThe switch runs the four positions every boater already knows by feel. Acc, Off, Run, and Start. Turn it to Acc and you've got power to your accessories without the engine running, which is handy for the stereo or the lights while you're rigged up at the dock. Off kills everything. Run is your key-on ignition position for normal operation. Start is the momentary crank position, spring loaded so it snaps back to Run the second you let go of the key. Nothing exotic here, and that's the point. It works the way your hands already expect it to.\u003c\/p\u003e\n\u003cp\u003eThe body is brass, and that matters more than it sounds. Brass holds up to the damp, salty air inside a console a lot better than plain steel, and it keeps the internal contacts working season after season. Sierra builds these to meet or exceed the original equipment part they replace, so you're not stepping down in quality when you swap out a factory switch. That's the whole idea behind the Sierra line. OEM-grade parts for engines and boats that actually see use.\u003c\/p\u003e\n\u003cp\u003eWiring is a four-wire connection, and this is where you want to slow down and do it right. Older outboards sometimes run a three-wire harness, so check what's coming out of your dash before you assume a plug-and-play swap. If you're short on lead length for a deep console run, extend the wires with proper marine-grade wire and seal the joints with heat-shrink. Don't leave bare copper anywhere near bilge spray. A little dielectric grease on the terminals at install goes a long way toward keeping corrosion out of the connections down the road.\u003c\/p\u003e\n\u003cp\u003eIt's a dash-mount switch, so it drops into a panel hole and tightens down from behind. Before you cut a new hole or reuse an old one, hold the switch body up to your cutout and confirm the fit. A hole that's too big needs an adapter plate or a fresh panel, and it's a lot easier to sort that out before you've got wires connected. Once it's mounted and wired, the key comes out clean and the switch sits low and flush on the helm.\u003c\/p\u003e\n\u003cp\u003eThis is a universal replacement, which makes it a solid fit for a wide range of outboard and stern-drive rigs where the original switch has worn out or seized. And these do seize up after a few seasons of salt and sun, so plenty of boaters keep a spare in the bag. If your boat has a neutral-safety interlock, test that the start circuit still works through the interlock after you wire it in. Running a tiller setup? You may not even need the accessory lead connected, so confirm your loads before you land every wire. It's a simple part at an honest price, and it'll have you cranking again without a trip to the dealer.\u003c\/p\u003e\n\u003cp\u003eOne last thing worth saying. A switch like this is cheap insurance. It's a small part that can strand you at the ramp when it fails, so if yours is getting notchy or the key is hard to turn, don't wait for it to quit on a Saturday morning. Swap it on your own schedule, take your time with the wiring, and you'll forget it's even there. That's exactly how a good ignition switch should be.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003eFour-position operation: Acc, Off, Run, and Start, with a spring-return Start for momentary cranking\u003c\/li\u003e\n  \u003cli\u003eBrass body stands up to the damp, salty environment inside a boat console\u003c\/li\u003e\n  \u003cli\u003eFour-wire connection for straightforward replacement wiring\u003c\/li\u003e\n  \u003cli\u003eDash-mount design installs through a panel hole and tightens down from behind\u003c\/li\u003e\n  \u003cli\u003eKeyed lock with key included\u003c\/li\u003e\n  \u003cli\u003eUniversal fit replaces a wide range of factory marine ignition switches\u003c\/li\u003e\n  \u003cli\u003eBuilt to meet or exceed the original equipment part it replaces\u003c\/li\u003e\n  \u003cli\u003eCompact, low-profile footprint once mounted at the helm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Sierra Marine reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat positions does this ignition switch have?\u003c\/summary\u003e\n    \u003cp\u003eFour. Acc, Off, Run, and Start. Start is spring-loaded and snaps back to Run as soon as you release the key.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill this fit my boat?\u003c\/summary\u003e\n    \u003cp\u003eIt's a universal four-position dash-mount switch designed to replace a wide range of factory marine ignition switches. Check that your dash uses a matching cutout and that your harness matches the four-wire connection before installing.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow many wires does it use?\u003c\/summary\u003e\n    \u003cp\u003eIt's a four-wire connection. Some older outboards run a three-wire harness, so confirm what's coming out of your dash before you wire it in.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs the key included?\u003c\/summary\u003e\n    \u003cp\u003eYes, the switch comes with a key.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the body made of?\u003c\/summary\u003e\n    \u003cp\u003eBrass, which holds up better to the damp, salty environment inside a console than plain steel and keeps the internal contacts working season after season.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I run accessories with the engine off?\u003c\/summary\u003e\n    \u003cp\u003eYes. The Acc position powers your accessories without the engine running. Just keep an eye on battery draw if you're sitting for a while.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it mount to the dash?\u003c\/summary\u003e\n    \u003cp\u003eYes, it's a dash-mount switch that installs through a panel hole and tightens down from behind.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I keep the connections from corroding?\u003c\/summary\u003e\n    \u003cp\u003eSeal any extended wire joints with heat-shrink and put a little dielectric grease on the terminals at install. Keep bare copper away from bilge spray.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this an OEM-quality part?\u003c\/summary\u003e\n    \u003cp\u003eSierra builds its parts to meet or exceed the original equipment they replace, and supplies many OEM engine and boat builders every day.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eSierra MP41020 Universal 4-Position Marine Ignition Switch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSierra Marine\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003eMP41020\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e808282191214\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eIgnition Switch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFitment\u003c\/th\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSwitch Positions\u003c\/th\u003e\n\u003ctd\u003eAcc-Off-Run-Start\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eNumber of Positions\u003c\/th\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eWiring\u003c\/th\u003e\n\u003ctd\u003e4-Wire Connection\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMounting\u003c\/th\u003e\n\u003ctd\u003eDash Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBody Material\u003c\/th\u003e\n\u003ctd\u003eBrass\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eKey\u003c\/th\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What positions does this ignition switch have?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Four. Acc, Off, Run, and Start. Start is spring-loaded and snaps back to Run as soon as you release the key.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will this fit my boat?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's a universal four-position dash-mount switch designed to replace a wide range of factory marine ignition switches. Check that your dash uses a matching cutout and that your harness matches the four-wire connection before installing.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How many wires does it use?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's a four-wire connection. Some older outboards run a three-wire harness, so confirm what's coming out of your dash before you wire it in.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is the key included?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes, the switch comes with a key.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What is the body made of?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Brass, which holds up better to the damp, salty environment inside a console than plain steel and keeps the internal contacts working season after season.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I run accessories with the engine off?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. The Acc position powers your accessories without the engine running. Just keep an eye on battery draw if you're sitting for a while.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does it mount to the dash?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes, it's a dash-mount switch that installs through a panel hole and tightens down from behind.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do I keep the connections from corroding?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Seal any extended wire joints with heat-shrink and put a little dielectric grease on the terminals at install. Keep bare copper away from bilge spray.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this an OEM-quality part?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Sierra builds its parts to meet or exceed the original equipment they replace, and supplies many OEM engine and boat builders every day.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Sierra Marine","offers":[{"title":"Default Title","offer_id":45073405739101,"sku":"2009372","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_cbb7ca4e-4783-4551-a683-a6b17e44b78a.jpg?v=1789771414","url":"https:\/\/nvnmarine.com\/products\/sierra-mp41020-4-position-marine-ignition-switch","provider":"NVN Marine","version":"1.0","type":"link"}